Free Batman: Arkham Asylum DLC Coming to All Platforms Next Week

News that Ro cksteady is going to release downloadable content for its Batman: Arkham Asylum for free.

Within the game, an in-game scrolling news ticker says that free DLC is headed to the game in nine days, or on September 17. No other details on the content are available yet, outside of Eidos’ confirmation that it will hit all platforms (PC, 360, PS3) simultaneously.